Account clash / “There is a problem with your Microsoft account. To fix this, sign in to account.live.com from a browser.”

You may click on File, Account, Sign out from all the account.
Once the sign out is completed, Sign in using the subscribed email account and check if you are able to use Office applications without any error message.

Try to log into www.office.com/myaccount website using the registered email account and check which account is displayed on the right hand top of the screen.
Note: ensure you sign in with the subscribed email account.

If it displays a different account, you may sign out and sign in with the account which is used to subscribe Office 365 Home Premium and check if it works as expected.

I hope the above information helps. Let us know if you need further assistance.
Thank you.
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